Perhaps you should try some spelling variations:
tranh thuc » trinh thuc, trang thuc, thanh thuy
can tranh » canh tranh, tan tran, van ranh
hanh khoa » hang khoa, anh khoa, hanh hoa
sach tren » sach tien, sach tranh
khoa hoa » khoa khoa, khoa hoc, khoa hoi
hoa thon » hoa trong, khoa than, hoa khong
tren tue » tren que, tren thuc, tri tue
cao khoa » lao khoa, bao khoa, cac khoa
tu sach » thu sach, su sach, te sach
tue cao » te cao, tu cao, tue lao
tu can » tu ban, tu cac, thu canh

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( tu can tranh thuc hanh khoa hoa thon ) or ( tu sach tren tue cao khoa hoa thon ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu can tranh thuc hanh khoa hoa thon ) OR ( tu sach tren tue cao khoa hoa thon )).
• Adding a wildcard symbol may retrieve word variants: (( tu can tranh thuc hanh khoa hoa thon ) or ( tu sach tren tue cao khoa hoa thon ))*.